2 CALIFORNIA ACADEMY OF SCIENCES. 



atobium inhabiting the smallest host is the largest and 

 possesses the largest cytospheres, while vice versa the 

 larger host houses the smaller species with the smaller 

 cytospheres. While in one and the same individual host 

 the size of the adult Spermatobia may differ some, I have 

 never observed the cytospheres of the respective speci- 

 mens to differ; this of course makes the difference in 

 size of the cytospheres in the two species to be of great 

 importance. I believe, therefore, I am justified in estab- 

 lishing two species, especially as I may thereby call atten- 

 tion to similar differences in other sporozoa. 



Spermatobium Freundi n. sp. Figs, i to 4, 6 to 9, ii to 

 18, 20 to 32, 34 to 37, 39 to 41, 43 to 45. 



Host, Phoenicodrilus taste, an oligochget from the Sierra 

 El Taste in the Cape Region of Baja California, Mexico. 



Adult and sporogonium (pansporoblast) about one-half 

 the diameter of those of the following species. Cyto- 

 spheres about half the diameter of those of the following 

 species. 



Spermatobium eclipidrili n. sp. Figs. 5, 10, 19, 38, 38, 

 42. 



Host, Ecli^idj-ihts frigidns, a oligoch^t from the Sierra 

 Nevada, Alpine Meadow, about 11,000 feet altitude, on 

 middle fork of King's River, Fresno county, Cal. Sperm- 

 sac of the host. 



Adult and sporogonium (pansporoblast) about twice or 

 more the diameter of the former species. Cytospheres 

 about twice the diameter of those of the former species. 



In the following I have not separated the two species, 

 as the various stages of development are evidently the 

 same in both. I have considered them together, and 

 placed the figures illustrating my remarks in consecutive 

 order, regardless of the species to which they refer. 



